michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: can: add kconfig CAN_MAX_MB

Browse source 
Each CAN instance of S32K344 has different maximum number
of message buffers, depends on payload. Add kconfig that
defines maximum number of message buffers for concurrent
active instances and update driver to compatible
support S32k344.

Signed-off-by: Cong Nguyen Huu <cong.nguyenhuu@nxp.com>
This commit is contained in:
Cong Nguyen Huu 2023-06-14 14:44:34 +07:00 • committed by Mahesh Mahadevan
commit a3fb2dcc2f
2 changed files with 18 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

9
drivers/can/Kconfig.mcux
View file

@ -21,12 +21,21 @@ config CAN_MCUX_FLEXCAN_FD
help
Enable support for CAN-FD capable NXP FlexCAN devices.
config CAN_MAX_MB
int "Maximum number of message buffers for concurrent active instances"
default 16
depends on SOC_SERIES_S32K3_M7
range 1 96
help
Defines maximum number of message buffers for concurrent active instances.
config CAN_MAX_FILTER
int "Maximum number of concurrent active RX filters"
default 5
range 1 15 if SOC_SERIES_KINETIS_KE1XF || SOC_SERIES_KINETIS_K6X
range 1 13 if SOC_SERIES_IMX_RT && CAN_MCUX_FLEXCAN_FD
range 1 63 if SOC_SERIES_IMX_RT
range 1 96 if SOC_SERIES_S32K3_M7
help
Defines maximum number of concurrent active RX filters

13
drivers/can/can_mcux_flexcan.c
View file

@ -49,14 +49,19 @@ LOG_MODULE_REGISTER(can_mcux_flexcan, CONFIG_CAN_LOG_LEVEL);
#define RX_START_IDX 0
#endif
/* The maximum number of message buffers for concurrent active instances */
#ifdef CONFIG_CAN_MAX_MB
#define MCUX_FLEXCAN_MAX_MB CONFIG_CAN_MAX_MB
#else
#define MCUX_FLEXCAN_MAX_MB FSL_FEATURE_FLEXCAN_HAS_MESSAGE_BUFFER_MAX_NUMBERn(0)
#endif
/*
* RX message buffers (filters) will take up the first N message
* buffers. The rest are available for TX use.
*/
#define MCUX_FLEXCAN_MAX_RX (CONFIG_CAN_MAX_FILTER + RX_START_IDX)
#define MCUX_FLEXCAN_MAX_TX \
(FSL_FEATURE_FLEXCAN_HAS_MESSAGE_BUFFER_MAX_NUMBERn(0) \
- MCUX_FLEXCAN_MAX_RX)
#define MCUX_FLEXCAN_MAX_TX (MCUX_FLEXCAN_MAX_MB - MCUX_FLEXCAN_MAX_RX)
/*
* Convert from RX message buffer index to allocated filter ID and
@ -1246,7 +1251,7 @@ static int mcux_flexcan_init(const struct device *dev)
data->dev = dev;
FLEXCAN_GetDefaultConfig(&flexcan_config);
flexcan_config.maxMbNum = FSL_FEATURE_FLEXCAN_HAS_MESSAGE_BUFFER_MAX_NUMBERn(0);
flexcan_config.maxMbNum = MCUX_FLEXCAN_MAX_MB;
flexcan_config.clkSrc = config->clk_source;
flexcan_config.baudRate = clock_freq /
(1U + data->timing.prop_seg + data->timing.phase_seg1 +